The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 41 |
| 4 | 176 |
| 5 | 679 |
| 6 | 2452 |
| 7 | 8447 |
| 8 | 28120 |
| 9 | 91147 |
| 10 | 289324 |
| 11 | 902721 |
| 12 | 2777112 |
| 13 | 8441319 |
| 14 | 25398500 |
| 15 | 75744301 |
| 16 | 224156984 |
| 17 | 658855781 |
| 18 | 1924932324 |
| 19 | 5593580859 |
| 20 | 16175728584 |
| 21 | 46572304083 |
| 22 | 133556779740 |
| 23 | 381611332725 |
| 24 | 1086759598120 |
[1,8,41,176,679,2452,8447,28120,91147,289324, 902721,2777112,8441319,25398500,75744301, 224156984,658855781,1924932324,5593580859, 16175728584,46572304083,133556779740,381611332725, 1086759598120] |